<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello</title>
    <script src="./lib/vue.js"></script>
</head>
<body>
    <div id="box">
        {{10 + 20}}
        {{ myname }}
    </div>

    <script>
        var vm = new Vue({
            el: "#box",
            data: {
                myname: "HelloWorld"
            }
        });
        console.log(vm);
    </script>

</body>
</html>